The Albedo-Warming Potential only calculates how much energy could be absorbed by the surface under clear sky conditions. It is good for the high thermal interia ocean, but on land the energy absorbed during the day radiates easily back to space during the night.
Documentation & Region description
Region represented in graph
Canada: whole country
USA: all states except Alaska and Hawaii
Europe: Northern-, West-, Central-, South-, East Europe
Asia: East-, Central-, West Siberia
Due to being a daily energy value the AWP isn't great for accessing snow melt. During summer the poles have a constant low intensity sunshine, which doesn't have the initial punch to force snow melt. For this reason we included an albedo independed "Peak Watt map" to show the maximum solar intensity during noon.
Snow extent data source: NSIDC
https://nsidc.org/data/g02156
National Ice Center. 2008, updated daily. IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions, Version 1.1-1.3. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N52R3PMC.